One in three Covid-19 survivors in a study of more than 230,000 mostly American patients were diagnosed with a brain or psychiatric disorder within six months, suggesting the pandemic could lead to a wave of mental and neurological problems, scientists said

Researchers who conducted the analysis said it was not clear how the virus was linked to psychiatric conditions such as anxiety and depression, but that these were the most common diagnoses among the 14 disorders they looked at, according to Reuters.

Post-Covid cases of stroke, dementia and other neurological disorders were rarer, the researchers said, but were still significant, especially in those who had severe Covid-19.

“Our results indicate that brain diseases and psychiatric disorders are more common after Covid-19 than after flu or other respiratory infections,” said Max Taquet, a psychiatrist at Britain’s Oxford University, who co-led the work.